package com.moyun.common.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @Author: Mr sheng.z
 * @Description: 实现了ApplicationContextAware ，这个类就可以获取到所有引用对象的bean
 * @Date: Create in 13:19 2020/6/30
 */
@Component
public final class SpringContextUtil implements ApplicationContextAware {
    protected static ApplicationContext applicationContext ;
    @Override
    public void setApplicationContext(ApplicationContext arg0) throws BeansException {
        if (applicationContext == null) {
            applicationContext = arg0;
        }
    }

    // 获取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    // 通过name获取 Bean.
    public static Object getBean(String name) {
        //name表示其他要注入的注解name名
        return applicationContext.getBean(name);
    }

    // 通过class获取Bean.
    public static <T> T getBean(Class<T> clazz) {
        return applicationContext.getBean(clazz);
    }

    // 通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
}